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Expired Canadian patentCanada

Method and apparatus for cleaning waste gases from aluminum production facilities

CA 1197074 A · Owner: Loukos, Isaias · Inventors: Loukos, Isaias

CIPO record

Overview

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A system for removing hydrogen fluoride finely divided solids, and hydrocarbons from aluminum production process emissions includes a vertical scrubbing chamber of constant cross-section for receiving the emissions, and an injector disposed axially within the scrubbing chamber for injecting finely divided alumina particles radially into the emission stream, and a filtering device for capturing the alumina particles and entrap pollutants.

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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.

Why it's free to use

  • Granted November 26, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 26, 2002.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 30, 1982
GrantedNovember 26, 1985
Term endedNovember 26, 2002
Patent numberCA 1197074 A
Classification (IPC)B01D53/10 +1 more

Timeline

Timeline From CIPO dates

1983198519871989199119931995199719992001Application filedSep 30, 1982Patent grantedNov 26, 1985Term endedNov 26, 2002

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.